/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#include "stdio.h"
volatile uint8_t rxITBuf;
volatile uint8_t rxBuf[100];
volatile uint8_t rxIn = 0;
volatile uint8_t rxOut = 0;

#include "ntshell.h"
#include "ntlibc.h"
#include "ntopt.h"



int uart_putc(char c)
{
    /*while (0 == (*pUART0_LSR & THRE)) {
        ssync();
    }
    *pUART0_THR = c;
    ssync();
    return c;*/
  HAL_UART_Transmit(&huart1, (uint8_t*)&c, 1, 0xff);
  return c;
}

int uart_getc(void)
{
    /*while (0 == (*pUART0_LSR & DR)) {
        ssync();
    }
    return *pUART0_RBR;*/
  int rcv;
  HAL_UART_Receive(&huart1, (uint8_t*)&rcv, 1, 0xff);
  return rcv;
}

int uart_puts(const char *s)
{
    int cnt = 0;
    char *p = (char *)s;
    while (*p) {
        uart_putc(*p);
        p++;
        cnt++;
    }
    return cnt;

    //HAL_UART_Transmit(&huart1, (uint8_t*)s, sizeof(s), 0xff);
    //return sizeof(s);
}




#define UNUSED_VARIABLE(N)  do { (void)(N); } while (0)

static int func_read(char *buf, int cnt, void *extobj)
{
  int i;
  UNUSED_VARIABLE(extobj);
  for (i = 0; i < cnt; i++) {
    buf[i] = uart_getc();
  }
  return cnt;
}

static int func_write(const char *buf, int cnt, void *extobj)
{
  int i;
  UNUSED_VARIABLE(extobj);
  for (i = 0; i < cnt; i++) {
    uart_putc(buf[i]);
  }
  return cnt;
}


typedef int (*USRCMDFUNC)(int argc, char **argv);


typedef struct {
    char *cmd;
    char *desc;
    USRCMDFUNC func;
} cmd_table_t;

static int usrcmd_help(int argc, char **argv);
static int usrcmd_info(int argc, char **argv);


static const cmd_table_t cmdlist[] = {
    { "help", "This is a description text string for help command.", usrcmd_help },
    { "info", "This is a description text string for info command.", usrcmd_info },
};

static int usrcmd_help(int argc, char **argv)
{
    const cmd_table_t *p = &cmdlist[0];
    for (int i = 0; i < sizeof(cmdlist) / sizeof(cmdlist[0]); i++) {
        uart_puts(p->cmd);
        uart_puts("\t:");
        uart_puts(p->desc);
        uart_puts("\r\n");
        p++;
    }
    return 0;
}

static int usrcmd_info(int argc, char **argv)
{
    if (argc != 2) {
        uart_puts("info sys\r\n");
        uart_puts("info ver\r\n");
        return 0;
    }
    if (ntlibc_strcmp(argv[1], "sys") == 0) {
        uart_puts("NXP LPC824 Monitor\r\n");
        return 0;
    }
    if (ntlibc_strcmp(argv[1], "ver") == 0) {
        uart_puts("Version 0.0.0\r\n");
        return 0;
    }
    uart_puts("Unknown sub command found\r\n");
    return -1;
}



static int usrcmd_ntopt_callback(int argc, char **argv, void *extobj)
{
    if (argc == 0) {
        return 0;
    }
    const cmd_table_t *p = &cmdlist[0];
    for (int i = 0; i < sizeof(cmdlist) / sizeof(cmdlist[0]); i++) {
        if (ntlibc_strcmp((const char *)argv[0], p->cmd) == 0) {
            return p->func(argc, argv);
        }
        p++;
    }
    uart_puts("Unknown command found.\r\n");
    return 0;
}

int usrcmd_execute(const char *text)
{
    return ntopt_parse(text, usrcmd_ntopt_callback, 0);
}

static int func_callback(const char *text, void *extobj)
{
  usrcmd_execute(text);
  return 0;
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  //char string[32];
  //scanf(string);
  //printf(string);

  HAL_Delay(20);

  

  //userShellInit();
  ntshell_t ntshell;
  //chip_init();
  //uart_init();
  ntshell_init(
      &ntshell,
      func_read,
      func_write,
      func_callback,
      (void *)&ntshell);
  ntshell_set_prompt(&ntshell, "BlueTank>");
  ntshell_execute(&ntshell);
  return 0;
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    //printf("Loop\r\n");
    //shellTask(&shell);
    HAL_Delay(100);
    //HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
    //HAL_GPIO_TogglePin(LED3_GPIO_Port, LED3_Pin);
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 8;
  RCC_OscInitStruct.PLL.PLLN = 168;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
  /** Enables the Clock Security System 
  */
  HAL_RCC_EnableCSS();
}

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, LED2_Pin|LED3_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pins : KEY1_Pin KEY0_Pin */
  GPIO_InitStruct.Pin = KEY1_Pin|KEY0_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /*Configure GPIO pins : LED2_Pin LED3_Pin */
  GPIO_InitStruct.Pin = LED2_Pin|LED3_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */


int _write(int fd, char *str, int len)
{
  /* Write "len" of char from "ptr" to file id "fd"
   * Return number of char written.
   * Need implementing with UART here. */
  for (int i = 0; i < len; i++)
  {
    //__io_putchar((*str++));
    HAL_UART_Transmit(&huart1, (uint8_t *)&str[i], 1, 0xFFFF);
  }
  return len;
}


int _read (int fd, char *ptr, int len)
{
  /* Read "len" of char to "ptr" from file id "fd"
   * Return number of char read.
   * Need implementing with UART here. */
  for (int i = 0; i < len; i++)
  {
    //__io_putchar((*str++));
    HAL_UART_Receive(&huart1, (uint8_t*)ptr, 1, 0xFFFF);
  }
  return len;
}

void _ttywrch(int ch) {
  /* Write one char "ch" to the default console
   * Need implementing with UART here. */
  HAL_UART_Transmit(&huart1, (uint8_t*)(&ch), 1, 0xFFFF);
}

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{ 
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
